Terminal and communication method

Abstract

A terminal includes a receiving unit that receives information for scheduling a first resource used for inter-terminal direct communication, information for scheduling a second resource used for a communication with a base station, and data through the second resource, from the base station; and a transmitting unit that transmits data to another terminal using the first resource, wherein the receiving unit receives a first response related to retransmission control corresponding to the transmitted data from the another terminal, wherein the terminal further includes a control unit that determines a third response related to retransmission control based on the first response and a second response related to retransmission control corresponding to the data through the second resource, and wherein the transmitting unit transmits the third response to the base station.

1 . A terminal comprising:
 a receiving unit that receives, from a base station,
 information for scheduling a first resource used for inter-terminal direct communication, 
 information for scheduling a second resource used for a communication with the base station, and 
 data through the second resource; and 
   a transmitting unit that transmits data to another terminal using the first resource,   wherein the receiving unit receives a first response related to retransmission control corresponding to the transmitted data from the another terminal,   wherein the terminal further includes a control unit that determines a third response related to retransmission control based on the first response and a second response related to retransmission control corresponding to the data through the second resource, and   wherein the transmitting unit transmits the third response to the base station.   
     
     
         2 . The terminal according to  claim 1 , wherein a codebook defining a retransmission response applied to the third response and a codebook defining a retransmission response applied to the second response are identical. 
     
     
         3 . The terminal according to  claim 2 , wherein, in a case where the codebook defining the retransmission response applied to the third response is semi-static, a payload size of the codebook defining the retransmission response applied to the third response is determined based on the first resource and the second resource. 
     
     
         4 . The terminal according to  claim 2 , wherein, in a case where the codebook defining the retransmission response applied to the third response is dynamic, a payload size of the codebook defining the retransmission response applied to the third response is determined based on a field included in the information for scheduling the first resource or the information for scheduling a second resource. 
     
     
         5 . The terminal according to  claim 1 , wherein a codebook defining a retransmission response applied to the first response differs from a codebook defining a retransmission response applied to the second response. 
     
     
         6 . A communication method executed by a terminal, the method comprising:
 a receiving procedure of receiving, from a base station,
 information for scheduling a first resource used for inter-terminal direct communication, 
 information for scheduling a second resource used for a communication with the base station, and 
 data through the second resource; and 
   a transmitting procedure of transmitting data to another terminal using the first resource,   wherein the receiving procedure includes receiving a first response related to retransmission control corresponding to the transmitted data from the another terminal,   wherein the method further includes a control procedure of determining a third response related to retransmission control based on the first response and a second response related to retransmission control corresponding to the data through the second resource, and   wherein the transmitting procedure includes transmitting the third response to the base station.